<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      function computed(str) {
        var newstr2 = "";
        for (var i = 0; i < str.length; i++) {
          if (str[i] == " ") {
          } else {
            if (str[i] == "!") {
              newstr2 += "啊";
            } else if (str[i] == "h") {
              newstr2 += "H";
            } else if (str[i] == "w") {
              newstr2 += "W";
            } else {
              newstr2 += str[i];
            }
          }
        }
        let newstr1 = newstr2.split("").reverse().join("");
        return newstr1;
      }
      console.log(computed(" hello world 我爱你!"));
    </script>
  </body>
</html>
